Back to EveryPatent.com
United States Patent |
5,341,948
|
Gaeta
|
August 30, 1994
|
Tamper evident seal
Abstract
This invention relates to a tamper evident inner seal for use on bottles,
jars and other types of containers. More specifically, this invention
provides a means for rendering a heat or adhesive sealed liner tamper
evident by enabling the liner to tear upon removal or opening, while
providing a peelable seal that does not leave seal residuals attached to
the container.
Inventors:
|
Gaeta; Stephen A. (Bloomfield, NJ)
|
Assignee:
|
CPC International Inc. (Englewood Cliffs, NJ)
|
Appl. No.:
|
894492 |
Filed:
|
June 5, 1992 |
Current U.S. Class: |
215/232; 215/305; 229/205 |
Intern'l Class: |
B65D 041/00 |
Field of Search: |
215/232,295,305
220/257,258,359
229/205,DIG. 5
|
References Cited
U.S. Patent Documents
749423 | Jan., 1904 | Chapman.
| |
2016936 | Oct., 1935 | Waring.
| |
2077985 | Apr., 1937 | Bukolt.
| |
3392901 | Jul., 1968 | Krzyzanowski | 229/DIG.
|
3620438 | Nov., 1971 | Wood et al. | 229/205.
|
3980224 | Sep., 1976 | Yasuda | 229/205.
|
4200196 | Apr., 1980 | Bashour | 215/253.
|
4555037 | Nov., 1985 | Rhees.
| |
Primary Examiner: Shoap; Allan N.
Assistant Examiner: Stucker; Nova
Claims
I claim:
1. A tamper evident seal comprising a sheet of directionally oriented
material with the peripheral portion having a plurality of V-shaped
notches each having two sides, wherein one side of the V-shaped notch is
cut on the perpendicular to the periphery of the seal and the second side
of the V-shaped notch is placed at an angle of from about 40.degree. to
about 50.degree. from the perpendicular side, wherein the V-shaped notches
are positioned so that the perpendicular side of the notch alternates from
notch to notch.
2. The tamper evident seal of claim 1 which is circular in shape and
wherein the V-shaped notches are spaced approximately every 45.degree.
around the periphery of the seal.
3. The tamper evident seal of claim 1 wherein the directionally oriented
material comprises foil, polyolefin and mylar.
4. The tamper evident seal of claim 1, wherein the second side of the
V-shaped notches is at a 45.degree. angle to the perpendicular side.
5. A tamper evident seal for use on a container which includes a hollow
body for holding material which has a neck at one end extending from the
body to terminate in a lip and circumscribing an opening into which
material is inserted and removed from the container and a cap for
placement over the opening onto the neck, and wherein the seal comprises a
sheet of directionally oriented material with a circular peripheral
portion having a plurality of V-shaped notches comprising two sides
wherein one side of the V-shaped notch is cut on the perpendicular to the
periphery of the seal and the second side of the V-shaped notch is cut at
an angle of 45.degree. from the perpendicular cut, wherein the V-shaped
notches are spaced approximately every 45.degree. around the periphery of
the seal and the perpendicular side of the V-shaped notches alternates
from notch to notch.
6. The tamper evident seal of claim 5 wherein the radii of the seal is less
than the radii of a container of intended use.
Description
This invention relates to a tamper evident inner seal for use on bottles,
jars and other types of containers. More specifically, this invention
provides a means for rendering a heat or adhesive sealed liner tamper
evident by enabling the liner to tear upon removal or opening, while
providing a peelable seal that does not leave seal residual deposits
attached to the container.
BACKGROUND OF THE INVENTION
A variety of "tamper proof", "tamper resistant" and "tamper evident"
closures and seals have been disclosed and proposed for inhibiting
improper or unauthorized opening of containers, or more importantly, to
indicate to the ultimate consumer that such an opening has occurred. The
main thrust behind this deluge of "tamper proof" or "tamper evident"
closures is to protect consumers against third party tampering with the
contents of the container, such as food or medicine, by placing them on
notice or making it obvious to the consumers that such tampering may have
occurred.
In U.S. Pat. No. 4,555,037 to Rhees, a tamper evident seal is disclosed and
claimed. The seal includes a sheet of material secured over the opening of
the container with the peripheral portions of the material extending
downwardly about and adhering to the exterior of the side walls of neck.
In U.S. Pat. No. 2,016,936 to Waring, a re-seal type closure for a
container is disclosed. The container closure comprises a re-seal cap and
an inner disk seal, wherein a continuous uniform bond is formed within the
edge of the material of the inner disk seal and the imperforate portion of
this disk spans the mouth of the container. Application of a lifting
stress to remove the disk from the top of the container results in the
tearing of the disk to perforate or puncture the portion of the disk
across the neck of the container.
In U.S. Pat. No. 4,200,196 to Bashour, a cap for a bottle is disclosed
which has a top portion for covering the open mouth of the bottle and two
spaced rings extending therefrom to define a groove to receive an annular
lip portion of the bottle. One of the rings can be angled toward the other
and be flexible such that the lip of the bottle is fully grasped and
maintained in the groove. The radially outer ring of the cap is provided
with a plurality of circumferentially spaced weakened areas so that when
the cap is removed from the bottle the outer ring will tear at at least
one of the weakened areas to identify when a cap has become unsealed from
its bottle.
Numerous attempts have been made over the years to provide tamper evident
closures for packages which provide the consumer with some degree of
comfort. The presently claimed invention provides such comfort by
incorporating a means to render a heat or adhesive sealed liner more
tamper evident by enabling the liner to tear upon removal while providing
a seal which, upon peeling, is totally removed from the container without
leaving any seal residue which the consumer needs to remove prior to
recycling of the container.
SUMMARY OF THE INVENTION
The present invention is related to a tamper evident, peelable seal for use
on various containers such as bottles and jars. The seal comprises a sheet
of directionally oriented material with a peripheral portion which has a
plurality of "V-shaped" notches. The V-shaped notches are specifically
designed so that one side of the V-shaped notch is cut on the
perpendicular to the periphery of the seal. The unique combination of the
V-shaped notches in directionally oriented material, in conjunction with
the placement of the seal on the container provides for a means to render
a heat or adhesive sealed liner tamper evident by enabling the liner to
tear upon removal and also be fully peelable, so as not to leave any seal
residue on the container.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top plan view of the tamper evident seal.
FIG. 2 is a detailed drawing which shows the angle of each V-shaped notch
and the preferred angle between the notches.
FIG. 3 is a perspective view of the tamper evident seal when it is
partially adherred to a container.
DETAILS OF THE INVENTION
The present invention relates to a tamper evident seal which comprises a
sheet of directionally oriented material with a peripheral portion having
a plurality of V-shaped notches. The seal may be used on a variety of
containers which are comprised of a hollow body for holding material, such
as bottles or jars. The combination of the unique V-shaped notches in a
directionally oriented material, in conjunction with the placement of the
seal on the container, allows for a heat or adhesive sealed liner that
tears upon removal and provides a fully peelable seal, which does not
leave residual material on the container i.e., no sealant or foil remains
on the surface of the lip of the container.
Specifically, as shown in FIG. 1, the tamper evident seal (1) of the
present invention comprises a sheet of directionally oriented material
with the peripheral portion (2) having a plurality of V-shaped notches (3)
FIG. 1. One side or edge of the V-shaped notch (4) is cut on the
perpendicular to the periphery of the seal, i.e., the side of the notch
with the edge of the seal forms a perpendicular or 90.degree. angle. The
second side of the V-shaped notch is then placed at an angle of from
40.degree. to 50.degree. from the perpendicular side, preferably
45.degree. as shown in FIG. 2. The perpendicular side of the V-shaped
notch is critical to the proper working of the present invention to allow
for the proper tearing or mutilation of the seal when force is applied to
remove the seal. The need for a perpendicular cut is directly related to
the use of directionally oriented material, which can be defined as
material which has a grain so that when pressure is applied, the material
tears along or in the direction of the material grain.
In order to insure that a number of the perpendicular sides of the notches
line up with or are co-directional with the grain of the material, the
placement of the notches around the periphery is critical to the proper
functioning of the tamper evident seal. The V-shaped notches are placed at
specific set distances around the periphery of the seal. In a container
with a round or circular opening, the optimum distance between the notches
is 45.degree. (7). If desired, it is possible to place the notches more
closely together such as every 20.degree. to 25.degree. around the
periphery, however the seal that is then formed with the container is not
as strong as the optimum seal due to the increased number of non-contact
points on the sealed periphery. Additionally, this may also impact the
economics of producing the tamper evident
As shown in FIG. 2, the V-shaped notches must be placed so that the
perpendicular side (4) of each V-shaped notch alternates from notch to
notch. Specifically, looking downwardly at the seal as FIG. 1, if one
V-shaped notch (9) has the perpendicular side on the left then the notch
(10) to its left should have the perpendicular cut on the right side of
the notch so that the two perpendicular cuts can be described as being
side by side on the seal. This placement of the notches helps to insure
that at least one, if not more, of the perpendicular sides of the notches
fall along or in the direction of the grain on the tamper evident seal.
The tamper evident seal can be comprised of a variety of materials,
provided that they are directionally oriented materials. An example of
such a directionally oriented material and the preferred embodiment of the
present invention is a combination of foil, polyolefin and mylar. This
material provides the necessary barrier to protect the contents of the
container while simultaneously allowing for an induction seal. Other
examples of suitable directionally oriented materials include
polypropylene, polystyrene, cellophane or the like.
The placement of the tamper evident seal on the container to be sealed is
also critical to the proper performance of the seal (FIG. 3). The
container (11) which is to be sealed can be any of a variety of containers
provided it includes a hollow body (12) for holding material, a neck (13)
at one end which extends from the body and terminates in a lip (14) which
circumscribes an opening into which material is inserted and removed from
the container. The container should also be comprised of a cap for
placement over the opening onto the neck which covers the tamper evident
seal, once it has been adhered to the container. Examples of containers
which would benefit from this seal are glass or plastic bottles and jars
which are used for holding food or pharmaceutical materials.
As shown in FIG. 3, the tamper evident seal is placed on the lip (14) of
the container to be sealed. The seal is sized so that the outside
circumference of the seal (2) is slightly larger than the outside
circumference (15) of the lip of the container. The notches are cut so
that the point or the tapered end just barely protrude into the sealing
area and the tamper evident seal is adhered to the inside peripheral area
of the lip (16) of the container. The sealing area is defined as that area
of the lip of the container and that area of the tamper evident seal which
come into direct contact with each other and which adhere to each other.
The optimal conditions, i.e., the optimal seal and the optimal peelability
of the tamper evident seal occur when the tamper evident seal is adhered
or sealed only to the inside periphery of the lip of the container, i.e.,
the tamper evident seal does not extend over the radii of the container.
This critical placement of the seal in conjunction with the shape and
placement of the notches on the seal provides for a unique tamper evident
seal or liner in that the seal is easily peelable or removable from the
container without leaving any adhesive or material residue on the
container. This saves the ultimate consumer work in removing the seal and
allows for easier recycling of the container.
While there has been shown and described what is considered to be the
preferred embodiments of the invention, it will of course be understood
that various modifications and changes in form or detail could readily be
made without departing from the spirit of the invention. It is therefore
intended that the invention be not limited to the exact form and detail
herein shown and described, nor to anything less than the whole of the
invention herein disclosed and as hereinafter claimed.
Top